Things were thought to have been easier. A year had passed since Discord and the Sinister Six attacked and their plan was foiled. Peter Parker and Twilight Sparkle thought they could spend the rest of their lives with their ever-growing family and group of friends.

They were wrong.

An old foe, Starlight Glimmer, allied herself with a group of villains from various worlds and joined them to merge them to create a multiversal empire. This brings about a whole new group of heroee in order to stop them.

And so, Peter and Twilight, with allies old and new, must unite, travel through this new unified world and put a stop to this scheme.